Alert archive / Virginia / Special Weather Statements in 2020

Special Weather Statement, NWS Blacksburg, VA

August 7, 2020Patrick County, Virginia

NWS Blacksburg, VA issued this special weather statement at Aug 7, 2020, 1:30 PM EDT for Patrick County, Virginia. It was in force for 30 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 7, 2020, 1:30 PM EDT (17:30 UTC)
Expired: Aug 7, 2020, 2:00 PM EDT
In force: 30 min
Issued by: NWS Blacksburg, VA

County Patrick County, VA

The radar

The Roanoke radar (KFCX), 27 km from the middle of the area, began a volume at 17:29 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Roanoke, VA (KRNK), launched 12:00Z, 5.5 hours before the alert went out and 82 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 26 J/kg
Mixed-layer CIN: -177 J/kg
Mixed-layer LCL: 850 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 79 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Blacksburg, VA wrote its last area forecast discussion before this special weather statement went out at Aug 7, 10:00 AM EDT, 3 hours 30 minutes earlier.

Area forecast discussion, Aug 7, 10:00 AM EDT, 3 hours 30 minutes before

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Hazardous weather outlook, Aug 7, 3:50 AM EDT, 9 hours 40 minutes before

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In the hours before

Local storm report, Aug 7, 10:19 AM EDT, 3 hours 11 minutes before

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Local storm report, Aug 7, 10:23 AM EDT, 3 hours 7 minutes before

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Local storm report, Aug 7, 10:40 AM EDT, 2 hours 50 minutes before

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Local storm report, Aug 7, 10:43 AM EDT, 2 hours 47 minutes before

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Local storm report, Aug 7, 11:01 AM EDT, 2 hours 29 minutes before

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Special weather statement, Aug 7, 1:30 PM EDT, 0 minutes before

Special Weather Statement
National Weather Service BLACKSBURG VA
130 PM EDT Fri Aug 7 2020

VAZ032-071800-
Patrick-
130 PM EDT Fri Aug 7 2020

...A STRONG THUNDERSTORM WILL AFFECT
NORTHEASTERN PATRICK COUNTY...

At 130 PM EDT, a strong thunderstorm was located over Woolwine,
moving east at 15 mph.

Winds in excess of 30 mph and pea size hail are possible with this
storm.

Locations impacted include...
Woolwine...
Rocky Knob Recreation Area...
Charity...
and Buffalo Ridge.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 3680 8038 3680 8036 3681 8035 3687 8019
      3685 8014 3673 8009 3671 8009 3670 8037
TIME...MOT...LOC 1730Z 255DEG 12KT 3678 8030

RR

The office that day

Everything else NWS Blacksburg, VA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 6, 8:39 PM EDT	Special Weather Statement	RNK	Campbell	51 min
Aug 6, 8:47 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Campbell, Charlotte, Franklin, Halifax, Pittsylvania	58 min
Aug 6, 9:09 PM EDT	Special Weather Statement	RNK	City of Lynchburg	36 min
Aug 6, 10:45 PM EDT	Areal Flood Advisory	RNK	Amherst, Bedford, Campbell, City of Lynchburg	117 min
Aug 7, 2:22 PM EDT	Special Weather Statement	RNK	Franklin	23 min
Aug 7, 2:44 PM EDT	Special Weather Statement	RNK	Franklin	46 min
Aug 7, 3:07 PM EDT	Areal Flood Advisory	RNK	Grayson	3 hr
Aug 7, 3:54 PM EDT	Special Weather Statement	RNK	City of Galax	36 min
Aug 7, 4:14 PM EDT	Special Weather Statement	RNK	Carroll	31 min
Aug 7, 1:34 PM EDT	Special Weather Statement	RNK	Alleghany	26 min
Aug 7, 2:10 PM EDT	Special Weather Statement	RNK	Alleghany, Ashe	35 min
Aug 7, 3:00 PM EDT	Special Weather Statement	RNK	Ashe	45 min
Aug 7, 3:04 PM EDT	Areal Flood Advisory	RNK	Ashe, Wilkes	3 hr
Aug 7, 3:29 PM EDT	Flash Flood Warning	RNK	Ashe	6 hr
Aug 7, 4:58 PM EDT	Special Weather Statement	RNK	Wilkes	32 min

Nearby

Special Weather Statements in Virginia, 2020 Every special weather statement in 2020

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.